SignalR:客户端断开连接 [英] SignalR: client disconnection

问题描述

SignalR如何处理客户端断开连接?我声明以下内容对吗?

How does the SignalR handle client disconnection? Am I right if I state the following?

• SignalR将通过Javascript事件处理来检测浏览器页面的关闭/刷新，并将适当的数据包发送到服务器(通过持久连接)；
• SignalR将不会检测到浏览器关闭/网络故障(可能仅通过超时).

我瞄准的是长轮询运输.

I aim the long-polling transport.

我知道这个问题，但想说明一点为我清除.

I'm aware of this question but would like to make it a bit clear for me.

推荐答案

如果用户刷新页面，则将其视为新连接.您是正确的，断开连接是基于超时的.

If a user refreshes the page, that is treated as a new connection. You are correct that the disconnect is based on a timeout.

您可以通过实现SignalR.Hubs.IConnected和SignalR.Hubs.IDisconnect来处理集线器中的Connect/Reconnect和Disconnect事件.

You can handle the Connect/Reconnect and Disconnect events in a Hub by implementing SignalR.Hubs.IConnected and SignalR.Hubs.IDisconnect.

以上指SignalR0.5.x.

The above referred to SignalR 0.5.x.

来自官方文档 (当前适用于v1.1.3):

From the official documentation (currently for v1.1.3):

public class ContosoChatHub : Hub
{
    public override Task OnConnected()
    {
        // Add your own code here.
        // For example: in a chat application, record the association between
        // the current connection ID and user name, and mark the user as online.
        // After the code in this method completes, the client is informed that
        // the connection is established; for example, in a JavaScript client,
        // the start().done callback is executed.
        return base.OnConnected();
    }

    public override Task OnDisconnected()
    {
        // Add your own code here.
        // For example: in a chat application, mark the user as offline, 
        // delete the association between the current connection id and user name.
        return base.OnDisconnected();
    }

    public override Task OnReconnected()
    {
        // Add your own code here.
        // For example: in a chat application, you might have marked the
        // user as offline after a period of inactivity; in that case 
        // mark the user as online again.
        return base.OnReconnected();
    }
}

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